I'm trying to watch videos on YouTube in my browser but I can't. I installed the latest versions of Adobe Flash (11.5.500.80 Beta & 11.4.402.278) but it did not help.
I tried on Chrome 22, Firefox 13 and IE 8 and nothing works. My OS is Windows 7 32 bit.
What should I do? Should I install other Silverlight or Shockwave?
Here's a screenshot of the error: